merge.tex

% these macros are needed by the output of the 'merge' program:

{\obeyspaces\global\let =\ }
\font\tteight=cmtt8
\font\ttten=cmtt10

\newdimen\outputBaseLineSkip
         \outputBaseLineSkip = 10pt % was 9pt
\newskip\beginOutputSkip
        \beginOutputSkip = 4.5 pt plus .5 pt minus .5 pt
\newskip\endOutputSkip
        \endOutputSkip   = 2.5 pt plus .25 pt minus .25 pt

\def\looserOutput#1{%
  \advance\beginOutputSkip by #1
  \advance\endOutputSkip by #1
}
\def\tighterOutput#1{%
  \advance\beginOutputSkip by -#1
  \advance\endOutputSkip by -#1
}

\def\beginOutput{%
    \par
    \penalty -150
    % \vskip \beginOutputSkip
    \penalty -150
    \begingroup
      \def\\{%
          \leavevmode
          \hss
          \endgraf
          \penalty 150
          }
      % \tteight
      \ttten
      % \baselineskip = \outputBaseLineSkip
      \parindent = 24pt
      \def\${\char`\$}
      \def\{{\char`\{}
      \def\}{\char`\}}
      \catcode`\_=\the\catcode`a
      \catcode`\^=\the\catcode`a
      \catcode`\#=\the\catcode`a
      \catcode`\~=\the\catcode`a
      \catcode`\&=\the\catcode`a
      \parskip=0pt
      \lineskip=0pt
      \obeyspaces
      }
\def\emptyLine{%
    \penalty -100
    % \vskip \endOutputSkip
    % \vskip \beginOutputSkip
    \penalty -100
    }
\def\endOutput{%
    \endgroup
    \par
    \penalty -150
    % \vskip \endOutputSkip
    \penalty -150
    \noindent}